Drawing mechanism



March 25 A. c. BUTLER DRAWING MECHANISM Filed Sept. 16.

Patented Mar. 25, 1924.

ARTHUR enon. BUTLER, or nos'ron, mnssncm'rsm'rs. I

nRawmemnonnnrsm.

Application filed September 16, 1922. Serial No. 588,582.

To all whom it may concern:

Be it known that I, ARTHUR CEoIL BUT- mm, a subject of the King of Great Britain,

residing at Boston, in the county of Suffolk and State of Massachusetts, have invented new and useful Improvements in Drawing Mechanism, of which the following is a specification.

This invention relates to mechanism for drawing fibrous material such as rovings, slivers and the like. Such mechanisms ordinarily comprise sets of rollers or other traveling surfaces between the nips of which theroving passes, successive sets of rollers being driven at progressively higher surface velocities so as to draw out and atte'nuate the roving. In connection with these rollers or other surfaces it has been proposed to employ friction plates between which and the surfaces the roving passes. The proper distances between the nips of successive sets of .rollers varies with the length of staple being drawn and it is there fore desirable to provide for relative adjustment ofthese rollers.

The present invention rovides a construction in which such ad ustment may be effected, but at the same time permits the retarding plate to project closel toward the nip of the succeeding pair of ro lers to properly direct the roving thereto quite irrespective of the positions of the adjusted rollers.

For a more complete understanding of this invention reference may be had to the accompanying drawings showing certain constructions embodying the invention by way of example in whic Figure 1 is a somewhat diagrammatic side elevation of one embodiment.

Figure 2 is a fragmentary plan of the same the upper rollers being removed.

Figure 3 is a detail of one of the retarding plates. 1

Figures 4 and 5 are views similar to Figures 1 and 2, but showing-a modified construction. Y

Referring first to Figures 1, 2, and 3, 1 indicates one of a series of spaced roller stands each having a journal at its forward end for a forward lower roller 2. Rearwardl of this roller a bracke't'3 is 'adjustably fixed so as to be moved toward and from the roller 2, this bracket having journaled therein an intermediate lower roller 4. Rearwardly of this bracket is a bracket 5 in the forward portion of which is journaled a lower roller 6. The bracket 5 also carries pivoted thereto the rear. end of a cap bar 7 which projects forwardly over the roller stand and is adjustable in length as by means of' a bolt and slot connection between its forward and rear parts as indicated at 8. The forward end of this bar 7 has guides for the slidable reception of journals on an upper forward roller 9 which cooperates with the lower roller 2 to form a mp for the passage of the roving. Above the roller 6 the bar 7 is provided with a guide for the reception of a trunnion of a roller 10 which cooperates with the roller 6 to form a rear nip through which the roving passes. To the rear of the rollers 6 and 10 is mounted a traverse bar 11 which is traversed back and forth in a manner well known in the art to efiect a travel of the roving lengthwise of the nips between the various rollers. The bracket 5 may be adjustable toward and from the bracket 3 by means of a bolt'and slot connection shown at 12} The bracket 3 may be adjusted while the machineis running to space the roller 4 relative to the rollers 2 and 9 by means of a rock shaft 13 having a pin 14 thereon entering a slot 15 in the bracket. The shaft 13 may be rocked by any suitable means and as herein shown a worm segment 16 is fixed thereto and meshing therewith is a worm 17 fixed to a shaft 18 which may be turned by means of a hand wheel 19. Gooperating with the roller 4 is a retarder plate 20 shown detached in Figure 3. This plate 20 has an intermediate flat portion 21 which rests on the rovin as it passes over the roller 4. The forward edge of the plate is inclined downward slightly at either end as shown at 22 and is provided with a roving guide formed by a slot 23. Between the tongue 25 which may rest' on a re uced por:

tion 26 of the roller 2 as, shown in Figure 2. The'rear edge ofthe plate 20 is downwardly' turned and has therein notches 30 forming roving guides in alinement with the notches 23. Between the notches the plate may have a rearwardly projecting tongue 31 which rests on a reduced portion 32 ofthe roller 6. If desired the rear end of this tongue may be turned downwardly as shown at 34 in Figure 3 to engage the rear portion of the roller 6.. This turned down portion may be used in place of the portions 24:, which may be then omitted, to hold the plate from being caughtbetween the rollers 2 and 9, or it may e omitted and the turned down portions 24 relied on instead.

With this construction it will be seen that the lower intermediate roller 4 may be adjusted toward and from the nip between the front rollers 2 and 9 without disturbing the plate 20 which is maintained at all times in position to direct the roving closely into the nip between the forward rollers. While as shown there is no connection between the ,thereby.

plate 20 and the traverse bar, the engagement of this plate on the rovings being relied upon to give it itstraversing movement, if desired, the tongue 31 might be prolonged into engagement with the traverse bar 11 as shown in Figure 2. Ordinarily, however, this is not deemed necessary.

In Figures 4 and 5 an arrangement employing five rows of rollers is shown. Referring to these figures the roller stand is indicated at'50 and carries at its forward end the forward roller 51. Cooperating with this roller is an upper roller 52 having trunnions guided in a cap bar 53 which is hinged at 54 to a bracket 55 adjustably supported at the rear end of the stand similar to the bracket5 of the first form described. Back of the front roller 51 is mounted a slidable bracket 56 which is adjustable toward and from the front roller 51 by means of a rock shaft 57 having a pin 58 therein engaginga slot 59 in the bracket similar to the mounting and method of adjustment of the bracket 3 shownin Figure 1. Any suitable means may be employed to rock this shaft, as, for example, worm and segment mechanism such as is shown in Figure 1. The bracket 56 has journaled therein a front intermediate lower roller 60, a central intermediate lower roller 61 and has adjustably fixed thereto abracket 62 in which is journaled a rear intermediate roller 63. Means for adjusting this bracket 62 similar to that for adjusting bracket 56 may be provided if desired. Back of the bracket 56 and journaled in the forward end of the bracket 55 is a rear lower roller 64. Resting on this roller is an upper roller 65 having trunnions journaled in vertical guides in the cap bar 53, while cooperating with the rollers and 61 is a roller 66 which extends between the cap bars of two.

spaced stands but is not otherwise guided Pressure may be exerted downwardly on the rollers and 66 and for this purpose a bar 67 is shown which eng over reduced portions 68 and 69 of the rollers 65 and 66 and may have hung thereover a link 70 to which a weight or spring may be applied.

Cooperating with the front and rear rollers 60 and 63 is a retarding plate 75. The rear portion of this plate comprises a substantially flat portion 76 having ears 77 extending therefrom closely adjacent the nip between the intermediate upper and lower rollers 66 and 61, these ears having slots 78 therein to serve as roving guides. The rear end of the portion 76 is downwardly bent as shown at 79 and may also have roving guide slots 80 in alinement with the guide slots 77. By this construction the bracket 62 may be adjusted toward and from the roller 61 without in any way changing the position of the plate 75 so that the ears 7 7 may extend closely adjacent the nip between the rollers 61 and 66 without danger of being seized thereby. Forwardly of the portion 76 the plate 75 has a narrow tongue portion which passes over a reduced portion 860i the lower roller 61 and carries at its forward end a wider portion 88 resting on the forward portion of the roller '60. This portion 88 preferably has cars 89 having roving uide slots 90 therein positioned closely adjacent the nip between the front rollers 51 and 52. The portions 88 and 85 of this plate are so shaped as to embrace the roller 60 to such an extent as to move therewith so that as the bracket 56 is adjusted the three intermediate lower rollers, the upper intermediate roller and the retarder plate move as a unit and the portions 89 move toward and from the nip between the rollers 51 and 52. The plate, however, is held against forward and backward movement relative to the rollers 61 and 66 by its engagement over the roller 60 so that the relationship of the ears 77 to the nip between the rollers 71 and 66 is not changed by adjustment of the roller 63. In this form also a traverse bar is shown at having roving guides 96 therein.

Having thus described certain embodiments of this invention it should be evident to those skilled in the art that many changes and modifications might be made therein without departing from its spirit or scope as defined by the appended claims.

I claim:

1. In a drawing mechanism, a pair of cooperating'rolle'rs through the nip of which a roving may pass, aroller adjustable toward and from said nip, and a retarder plate 00- operating with said roller in all positions of its adjustment and projecting closely to the nip between said pair of rollers to an extent independent of the position of said roller.

2. In a drawing mechanism, a pair of cooperating rollers through the nip of which a roving may pass, a roller positioned at the rear of said mp, a retarding plate cooperating with said roller and acting to present the roving to said nip, and means for adjusting said roller relative to said plate toward and from said nip.

3. In a drawing mechanism, a pair of cooperating rollers through the nip of which a roving may pass, a roller positioned at the rear of said nip, a retarding plate cooperating with said roller and acting to present the roving to said nip, and means for adjusting said roller relative to said plate toward and from said nip while the mechanism is running.

4. In a drawing mechanism, a pair of cooperating rollers through the nip of which a roving may pass, a lower roller positioned to the rear of said nip and adjustable toward and from said nip, a retarding plate resting on the roving passing over said lower rollers, and means for holding said plate with its forward edge closely adjacent said nip regardless of the position of adjustment of said lower roller.

5. In a drawing mechanism, a pair of cooperating rollers through the nip of which a roving may pass, a lower roller positioned to the rear of said nip and adjustable toward and from said nip, a retarding plate resting on the roving passing over said lower rollers, and means for holding said plate with its forward edge closely adjacent said nip regardless of the position of adjustment of said lower roller, said forward edge being provided with a roving guide.

6. In a drawing mechanism a pair of cooperating rollers through the nip of which a roving may pass, a lower roller positioned to the rear of said nip and adjustable toward and from said nip, a retarding plate having a flat portion resting on the roving passing over said lower roller, and means for holding said plate with its forward edge closely adjacent said nip regardless of the position of adjustment of'said lower roller.

7 Ina drawing mechanism, a pair of cooperating rollers, three rollers in series back of the nip between said cooperating rollers, a roller cooperatin with the front and a middle roller of sald threerollers to form nips through which a roving may pass, and- IL retarding plate acting to press the rovin against the front and rearmost of sai three rollers.

8. In a drawing mechanism, a pair of cooperating rollers, three rollers inseries back of the nip between said cooperating rollers, a roller cooperat' with the front and a middle roller of sai three ,rollers to form ni s through whicha roving may pass, a retarding late acting to press the roving against the out and rearmost of said three rollers, and means to adjust saidthree rollers and plate as a unit toward and from t he nip between said cooperating rollers.

9. In a drawing mechanism, a'pair of co operating rollers, three rollersin series back ,acting on said bar.

, roller beingf of the nip between said cooperating rollers, a roller cooperatin with the front and middle roller of said t ree rollers to form nips through which a roving may pass, a retarding plate acting to press the roving against the front and rearmost of said three rollers, and means by which said rearmost roller may be adjusted relative to said plate toward and from the nip between said middle and its cooperating roller. v

10. In a drawing mechanism, a pair of cooperating rollers, three rollers in series back of the nip between said cooperating rollers, a roller cooperatin with the front and a middle roller of sai three rollers to form nips through which a roving may pass, a retarding plate acting to press the roving against the front and rearmost of said three rollers, means to adjust said three rollers and plate as a unit toward and from the nip between said cooperating rollers, and means by which said rearmost roller may be adjusted relative to said plate toward and from the nip between said middle and its cooperating roller. D

11. A drawing mechanism comprising front and rear pairs of cooperatin upper and lower rollers through the nips tween which a roving may pass, three in-termedlate lower rollers, an upper intermediate roller resting on the roving as it passes over the middle and front intermediate lower rollers, a retarding plate cooperating w1th the front and rearmost intermediate rollers, and means for applying pressure to certam of said upper rollers.

12. A drawing mechanism comprising front and rear pairs of cooperatin upper and lower rollers through the mps tween which a roving may pass, three intermediate lower rollers, anupper intermediate roller resting on'the roving as it passes over the middle and front intermediate lower rollers, a retarding plate cooperating with the front and rearmost intermediate rollers, a

barresting on the rear and intermediate upper rollers, and pressure applying means 13. A drawing mechanism'com risi a plurality of rollers, and a retarding p ate cooperating with two of said rollers, one of said two rollers being adjustable toward and from the other of said two rollers and relative to said plate.

14. A drawing mechanism. comprising a plurality of rollers, a retarding plate coopcrating with two of said rollers, said late being formed to engage one of said ro ers, and having a fiat portion cooperating with the other of said two rollers, said other adjustable toward and from said one ro er andvrelative to said plate.

In/testimony whereof I haxe affixed my sign ature.

I ARTHUR CECIL BUTLER. 

